"""
=        :   把右边的值赋值给左边
"""
b = 200
a = b
print(a)# 200

# 复合赋值运算  (赋值运算符 + 算数运算符一起使用)
# +=,-=,*=,/=,//=,%=,**=,
a += b   # a =  a+b
print(a) # 400

